If you first move the CE window to the very right of the screen / to a secondary monitor, close it and then decrease the desktop resolution / disable the secondary monitor, CE will open "outside the screen" and the only way to move it back is WindowsKey+ArrowKeys

Steps To Reproduce

1)open CE
2)Move the CE window to the very right of the screen / to a secondary monitor
3)close CE
4)decrease the desktop resolution / disable the secondary monitor
5)open CE